You can view BOM records without making changes to them.
Open: Bill of Materials > Enquiries > View Bill of Materials.
The BOM details are displayed.
The View Component Details window appears.
Note: Sub-assemblies are shown in blue.
The View Bill of Material Record window for the sub-assembly appears.
This works exactly the same way as described in this process To view BOM records.
The view Operation Record window appears.
The View Document Line window appears.
The View Comment Line window appears.
Note: There must be at least two costing records for you to view cost analysis.
Note: There must be at least two BOM planned costing records for you to view the actuals comparison.
Note: The history is visible if you select Keep BOM change history in the Bill of Material settings General tab.